58results about How to "Large pitch" patented technology

The invention discloses a coal-based direct reduced iron shaft furnace and belongs to the technical field of coal-based direct reduced iron process equipment. The furnace body of the coal-based direct reduced iron shaft furnace is erected at a support steel structure, and the furnace body comprises a reduction cavity, burning cavities, and a discharge device; the reduction cavity is a rectangular structure cavity body composed of two parallel heat-conduction walls and the upper and lower parts of the reduction cavity are respectively provided with a sealed feed port and a sealed discharge port; the burning cavities provided with multiple layers of horizontal fire gas baffling channels are positioned at the both sides of the reduction cavity; and the discharge device is a spiral conveyer, the cylindrical shell of the spiral conveyer is of a jacket water cooling structure, and a spiral rotating shaft is a hollow water cooling structure. Compared with the tradition tubular reduction cavity body, the coal-based direct reduced iron shaft furnace provided by the invention has the advantages of high efficiency of heat transmission, and uniform heating of the inner and outer layers of a pelletized material in the furnace. The coal-based direct reduced iron shaft furnace can be used for effectively reducing the energy consumption of reduced iron and improving the merchantable quality and the production efficiency of a single furnace.

The invention discloses a medical connecting device. The medical connecting device has a near end and a far end and comprises an insulating layer and a spiral tube, wherein the insulating layer coversthe outermost layer of the whole device; the spiral tube is of a conductive hollow tubular structure and has a spiral structure; and the spiral structure has a screw pitch gradually changing from thenear end to the far end. According to the medical connecting device, the functions of electric conduction, liquid passing, powder spraying, negative pressure suction, sealing, insulation, supportingand the like can be integrated.

The invention discloses a spring machine with a spring length adjusting device, and belongs to the technical field of precise efficient processing and forming equipment. The spring machine is provided with a push broach which is propped against the external surface of a spring. According to the spring machine, when the pitch of the spring excesses a specified value, a control system drives a driving motor so that an eccentric sleeve rotates, and the push broach is moved back, thus, the pressure on the spring can be released, as a result, the pitch of the spring is reduced; conversely, when the pitch of the spring is less than the specified value, the pressure on the spring is increased through the push broach under the driving of the driving motor and the eccentric sleeve, thus the pitch of the spring is raised. The spring machine has simple structure, and is convenient to operate, and can effectively improve the percent of pass of the product and reduce the cost of production; and the spring machine removes the conventional mode of manually adjusting the processing cutter, and therefore the precision of the product can be greatly improved.

The invention discloses a precise regulating and aligning device of a shaft coupler. The precise regulating and aligning device comprises at least three regulating units which are separately distributed on at least three corner positions of a base plate of a prime motor, wherein each regulating unit comprises a horizontal regulating assembly, a perpendicular regulating assembly, a locking part and a foundation bolt; a first assembly hole with aperture greater than the diameter of each foundation bolt, is formed in the position, at the mounting position of each regulating unit, of the base plate of the prime motor separately; and one end of each foundation bolt is locked to the ground, and the other end of each foundation bolt sequentially passes through each perpendicular regulating assembly, each horizontal regulating assembly and each first assembly hole, and then is connected to each locking part. The precise regulating and aligning device of the shaft coupler is simple in structure and is high in practicability and takes each foundation bolt as reference datum; each horizontal regulating assembly and each perpendicular regulating assembly precisely regulate a position in the X-axis direction, a position in the Y axis direction and a position in the Z-axis direction of the base plate separately, so that operation is simple and effective, and labor intensity and difficulty of aligning work are reduced, and therefore, mounting quality and mounting efficiency of machine equipment are guaranteed.

The invention relates to the field of machining, in particular to a reversed cone spiral roller ultra-fine grain rolling method of a large-sized titanium alloy bar. The reversed cone spiral roller ultra-fine grain rolling method of the large-sized titanium alloy bar comprises the following steps that of designing a rolling tool, wherein roller design and guide plate design are involved specifically, and each roller is arranged to be a hyperboloid circular-truncated-cone-like spiral roller; forming a deformation area, wherein the curved faces of the two guide plates are oppositely arranged, thetwo rollers are placed between the two guide plates, and the area defined by the two guide plates and the two rollers is the deformation area; forming a constant-ovality deformation area, wherein theovality in the deformation area is kept constant; and selecting a rolling feeding manner, wherein inverted feeding type rolling manner is adopted. By the adoption of the reversed cone spiral roller ultra-fine grain rolling method of the large-sized titanium alloy bar, by designing the hyperboloid circular-truncated-cone-like spiral rollers and the curved-face guide plates and forming the constant-ovality deformation area, severe plastic deformation can be generated on the premise of remarkably restraining the Mannesmann effect of the core portion.

The present invention relates to a lifting device, especially a crankshaft bearing lifting device for installing the crankshaft bearing in a internal-combustion engine or disassembling the crankshaft bearing from the internal-combustion engine. The lifting device comprises a first basal body (11) with a first platform (12), a second basal body (14) with a second platform (15) and a cannular middle body (17) which mounts the first basal body (11) to the second basal body (14). The section (13) of the first basal body (11) exserted relative to the first platform locates in a first end part (18) of the cannular middle body (17), the section (16) of the second basal body (14) exserted relative to the second platform locates in a second end part (19), which are guided rotatablely by screw thread separately. Thus by means of the rotatable cannular middle body (17), on the one hand, the middle body (17) can be adjusted relative to the first basal body (11) telescopically, on the other hand, the second basal body (14) can be adjusted relative to the middle body (17) telescopically, that is the first basal body (11) and the second basal body (14) move in the same direction or in the different direction, which is based on the rotary direction of the middle body (17).

The invention discloses a reverse conical spiral roller ultra-fine grain rolling method of a large-size 45 steel bar, and relates to the field of machining. The method comprises the following steps that a rolling tool is designed, wherein design specifically comprises roller design and guide plate design, and rollers are designed to be dual-curve-face round-table-shaped spiral rollers; a deformingarea is constructed, wherein curve faces of two guide plates are oppositely placed, the two rollers are placed between the guide plates, and the area defined by the guide plates and the rollers is the deforming area; an equal ovality deforming area is constructed, wherein ovality in the deforming area is kept unchangeable; and the inverted feeding manner is selected, wherein the pouring-in type rolling manner is adopted. According to the reverse conical spiral roller ultra-fine grain rolling method of the large-size 45 steel bar, through design of the dual-curve-face round-table-shaped spiralrollers and the curve guide plates, the equal ovality deforming area is constructed, and the violent plastic deforming is generated on the premise of obviously restraining the heart Mannesmann effect.

The invention discloses an ultrafine grain rolling method of a large-size 45 steel bar, and relates to the field of machining, particularly to the ultrafine grain rolling method of the large-size 45 steel bar. The ultrafine grain rolling method comprises the following steps of design of rolling tools, specifically comprising design of rollers and design of guide plates: setting the rollers as double-curved surface circular table rollers, specifically, forming generatrices of the rollers through connecting two curves, and setting one surfaces of the guide plates as curved surfaces; constructionof a deformation zone: oppositely placing the curved surfaces of the two guide plates, placing the two rollers between the guide plates, and setting a region refined by the two guide plates and the two rollers as the deformation zone; and selection of rolling feeding manner: selecting reverse feeding rolling manner, and constructing an even-ovality deformation zone. According to the ultrafine grain rolling method of the large-size 45 steel bar provided by the invention, the double-curved surface circular table rollers and the curved surface guide plates are designed, the even-ovality deformation zone is constructed, and severe plastic deformation under the precondition of the Mannesmann effect of a central part can be remarkably inhibited.

The invention provides a trailer arm assembly belonging to the technical field of vehicle dragging devices and solving the problem of poor stability of the existing trailer arm. The trailer arm assembly is characterized by comprising a connecting arm, a supporting arm, a main ball head and an auxiliary ball head, wherein the supporting arm is connected with the connecting arm, and a mounting hole is formed in the supporting arm; the main ball head is provided with a cylindrical extension part inserted to the mounting hole; and the auxiliary ball head is provided with a mounting part which is inserted to the extension part and is in threaded connection with the extension part. The trailer arm assembly has the advantages of simple structure, connection firmness and good stability.

The invention relates to a furniture fitting (1) comprising the following: - a flange (12) for contacting a furniture part (3), and - at least one securing device (7) for securing the furniture fitting (1) to the furniture part (3) by means of the flange (12), wherein - the securing device (7) has at least two securing elements (10a, 10b), which can be inserted into an opening (11), in particulara cylindrical bore, of the furniture part (3), and at least one rotatably mounted locking element (8). The at least two securing elements (10a, 10b) can be moved relative to each other and relative tothe flange (12) by rotating the locking element (8) in a first rotational direction starting from a starting position, and the securing elements can thus be pushed into a spreading position in whichthe at least two securing elements (10a, 10b) can be locked in the opening (11) of the furniture part (3). The at least two securing elements (10a, 10b) can be released from the opening (11) by rotating the locking element (8) in a second rotational direction, wherein the at least two securing elements (10a, 10b) are pretensioned in the direction of the starting position by at least one force accumulator (17) such that the at least two securing elements (10a, 10b) can be retracted out of the spreading position into the starting position by rotating the locking element (8) in the second rotational direction.

The invention discloses an ultra-fine grain rolling method of a large titanium alloy bar and relates to the field of machining, in particular to the ultra-fine grain rolling method of the large titanium alloy bar. The ultra-fine grain rolling method of the large titanium alloy bar comprises the following steps that rolling tools are designed, roller design and guide plate design are included, eachroller is designed into a double-curved face type circular truncated cone roller, and specifically, a bus of each roller is formed by connecting two curves, and one face of each guide plate is designed into a curved face; a deformation zone is configured, wherein the curved faces of the two guide plates are oppositely arranged, the two rollers are arranged between the guide plates, and a regiondefined by the two guide plates and the two rollers is the deformation zone; an equal ovality deformation zone is configured, wherein ovality in the deformation zone is kept unchangeable; and a rolling feeding manner is selected, wherein a backward advancing rolling manner is adopted. According to the ultra-fine grain rolling method of the large titanium alloy bar, by designing the double-curved face type circular truncated cone rollers and the curved face-shaped guide plates and configuring the equal ovality deformation zone, intensive plastic deformation can be generated on the promise of remarkably restraining a Mannesmann effect of the heart.

The invention discloses an ultrafine grain rolling method of a large-size 45 steel bar, and relates to the field of machining, particularly to the ultrafine grain rolling method of the large-size 45 steel bar. The ultrafine grain rolling method comprises the following steps of design of rolling tools, specifically comprising design of rollers and design of guide plates: setting the rollers as double-curved surface circular table rollers, specifically, forming generatrices of the rollers through connecting two curves, and setting one surfaces of the guide plates as curved surfaces; constructionof a deformation zone: oppositely placing the curved surfaces of the two guide plates, placing the two rollers between the guide plates, and setting a region refined by the two guide plates and the two rollers as the deformation zone; and selection of rolling feeding manner: selecting reverse feeding rolling manner, and constructing an even-ovality deformation zone. According to the ultrafine grain rolling method of the large-size 45 steel bar provided by the invention, the double-curved surface circular table rollers and the curved surface guide plates are designed, the even-ovality deformation zone is constructed, and severe plastic deformation under the precondition of the Mannesmann effect of a central part can be remarkably inhibited.

The invention provides a cyclohexane oxane liquid crystal monomer compound and a preparation method of the cyclohexane oxane liquid crystal monomer compound. The structural formula of the compound isshown in the following formula, wherein R is any one of fluorine, chlorine, H, cyano, C1-C5 linear chain alkyl and C1-C5 linear alkoxy. The cyclohexane oxane liquid crystal monomer compound provided by the invention contains sulfonyl laterally and can change the phase transition temperature of molecules, the prepared monomer mixture not only has the advantage of low viscosity, but also has the characteristics of wide phase transition temperature and long screw pitch, and can be taken as raw materials of liquid crystal materials, thereby being beneficial to lowering the rotational viscosity ofthe liquid crystal materials and improving various dielectric coefficients.

The invention discloses a liquid crystal monomer fluorine dioxane contained compound and a production method thereof. The structure of the compound is: FORMULA, wherein in the formula, R is one of fluorine, chlorine, H, linear alkyl of C1-C5, and linear alkyl of C1-C5; R' is one of fluorine, chlorine, H, linear alkyl of C1-C5, linear alkyl alkoxy of C1-C5, and cyan; R is the same as R' or different from R'; and the compound can be independently or mixed for liquid crystal display in various display forms. The compound and the method provided by the invention has he characteristics of liquid crystal display, meeting the requirement of 3D (three-dimensional) display technology, reducing the rotary viscosity of liquid crystal material and improving the liquid crystal material.

The invention discloses a guide device being convenient to the roll barrel wall of a petrol barrel. The guide device comprises a bottom plate, baffles, a fixing block and screws I, wherein the quantity of the baffles is two, and the baffles are parallel to each other and located on the upper surface of the bottom plate; the fixing block is arranged between the two baffles, and one end of the fixing block is connected, near the bottom plate, with the bottom plate; and the quantity of the screws I is two, one screw I penetrates through one baffle vertically and then is connected with the fixing block in a rotating mode, the other screw I penetrates through the other baffle vertically and then is connected with the fixing block in a rotating mode, all of the screws I can rotate around axes of the screws I, and the screws I can drive the corresponding baffles to move. One side of a steel plate contacts with the plate surface of one baffle in parallel, and the other side of the steel plate contacts with the other baffle in parallel. A rotating screw I makes the baffles to produce a certain top tightening force for both sides of the steel plate, so that the axis of the steel plate parallels to the direction of forward motion, a cylindrical rolling plate which the end surface is not perpendicular to the axis is avoided to be bended out, and the manufacturing costs and the rejection rate are reduced.

The invention relates to a reverse cone spiral roller ultra-fine grain rolling method of a large-size aluminum alloy bar, and relates to the field of mechanical processing. The method includes the following steps that a rolling tool is designed, wherein roll design and guide plate design are specifically included, and rollers are arranged to be double curved surface type circular-table-shaped spiral rollers; a deformation zone is constructed, wherein the curved surfaces of two guide plates are oppositely arranged, the two rollers are placed between the guide plates, and an area defined by thetwo guide plates and the two rollers is the deformation zone; an equal-ovality deformation zone is constructed, wherein the ovality in the deformation zone remains unchanged; and a rolling feeding mode is selected, wherein a reverse rolling mode is adopted. According to the reverse cone spiral roller ultra-fine grain rolling method of the large-size aluminum alloy bar, the double curved surface type circular-table-shaped spiral rollers and the curved surface guide plates are designed, the equal-ovality deformation zone is constructed, and acute plastic deformation is generated on the premise that the heart Mannesmann effect is significantly suppressed.